Braiding machine



July 14, l 925.

O. A. FREDERICKSON BRAIDING MACHINE Filed May l, 1923 4 Sheets-Sheet 1 .Hmmm

/NVENTOD @m @L zw BY Ro-rtf). 9861.1.

ATTORNEY July 14, 1925.

O. A. FREDERICKSON BRAIDING MACHINE Filed May l, 1923 4 Sheets-Sheet L? `Iuly 14, 1925. 1,546,341

o. A. FREDERICKSON BRAIDING MACHINE Filed May l, 1925 4 Sheets-Sheet 5 BY m11! %`M ATTORNEY July 14, 1925.

O. A. FREDERICKSON BRAIDING MACHINE Filed May l, 1923 4 Sheets-Sheet 4 (011;, QLSIMAJM'AAM BY Mt. F? $6@ ATTQRNEY The product. of the braiding machine in accordance with the present invention may be a braided strand, a braided tube, or a braided covering for a core, and in the following description this capacity of the machine will. be understood. The character of the iilame'nts that may be braided may vary within wide limits and be'constituted as yarns, strands, silk, wire, and in fact any usual type of filament adapted for the eneral purposes of braiding, but lhereina ter, for the sake of brevity and identification, the term yarn will be employed in its broad sense to designate all of these differ ent kinds of filaments.

The su porting frame for the operating parts of t e machine may be of any suitable ty e in which rigidity and freedom from vi ration is generally des-firablc. In the presenfV case the-supporting frame comprises the table or top plate l mounted upon suit- 4 able legs 2 and rising from the-topl frame or table 1 is the iixed cam plate 3. v

The supporting frame carries a yoke 4 which at its central lower portion is provided with a fixed bearing 5 for the upwardly extending fixed central tube 6, the construction bemg such that the yoke frame and 'central bearing 6 form rigid supports for certain of the moving partsof the -machine, as will presently appear.

The central support 6 is formed as a hollow tube, and in the present instance-there is shown a `core 7 which is passed through the central su port 6 and is tobe covered with thebrai ing material at thebraiding.

point. Y 1

The table 1 is of circular contour, as indicated in Fig, 1,-and has the arched frame 8 secured to 1t at op osite .sides of' the vertical central axis o the machine. Secured to the arch 8 is the arm 9 extending towards the axis of the machine and at its inner end supporting Athe sleeve or tubular conduit 10, the lower end portion of which is preferablyv ta .ered and constitutes what may be hereina er termed the braidingpoint 11. The conduit 10 is formed tubular as shown andthe core, `in the resent instance, as it is coveredby the braiding material, passes upwardly, as indicated in Fig. 1, and about the take-up drum 12. The take-up drum 12 is mounted on the shaft or spindle 13 carried by a frame 14 which may be conveniently formed as a part of the arch 8 or be secured thereto. The take-u drum 12 is connected to or is formed wi the take-up gear 15,

Fig. 1, and is drivenpfrom a similar gear 16- The gear 19 is .tired to the shaft 20 on which 1s the beveled wear. 21 driven by a correspondingly bevele gear 22 on the upright shaft 23, the lower end portion of W `ch may be connected by suitable means to a' going art of the machine, the construction being such that as the machine is o erated to braid the yarn, the finished pro uct is taken up by the take-up mechaq nism.

Mounted for rotative movement upon the central support 6 is a sleeve 24 to which is secured the driver gear 25. The driver gear 25 is connected to the drivers, as will more fully appear, to impart thereto a movement to traverse the inner yarn carriers in their annular path.

Loosely mounted upon the sleeve 24 is the hub 25x of the main rotary frame 2G which is of general circular contour having the upwardly extending outer portions 27.

The main rotary frame 26 carries the toothed circular rack 28 on its under surface and the driver gear 25 carries a similar toothed rack 29, both of which are 'engaged by a driving gear 30, Fig. 2, and may be driven in opposite directions by rotation of said gear. v

The toothed. racks 28 and 29 are of lar e diameter and are preferably secured to te main rotary frame and the driver gear at a point remote from the machine center in order to contribute to stability and ease in runningat high speed. y

The driving gear 30 is mounted outhe shaft 31, Fig. 2, which is supported in suitable bearings 32 carried by the machine sup orting frame. the )earings 32 are formed in the yoke frame 33 which may be hung from the table or top frame' 1.` i 'A y Mounted upon the driving shaft 31 are `thexixed andl loose pulleys 34; and'35 re spectively which are adapted to be engaged by a' driving -belt 36 actuated from a suit-- a l e source of power, not shown. In' order that the belt may be lconveniently shifted from one tothe other of said pulleys to per mit the machine to be either run or remain at rest, a belt shifter 37 is provided, between the bifurcated end portions of which runs the belt 36, Fig. 1'. The belt shifter 37 is secured to the upwardly extending shaft 38,

In the present instance 4 position. In the present instance the catch.

is formed by an arm 41 ivoted at 42 to the lever 40. and having e siouldered end portion 1&3, best shown by Fig. 5. which is nutomaticully thrown into engagement with a trip 44 when the lever-'is moved to start the niechine.

The tripll willl niaintainthe belt upon the 1 continue to run, when, however, the trip ifi is polled from its holding position 'with the arm 41, Fig. 5, as may be done by any usuel iorm of electro-magnet and armature m'echunism,fthe mchine will be automatically brought to rest.

To stabilize the machine so that. it may be. run smoothly und evenly atfhigh speed` the driver geerv andv the` mein rotary frame 2G are each"supported by associate driver gear 25 has its under surface revolution of said' partsl In vaccordance with the present invention, the yokeg supporting` traine Il is provided-with the lower bell race whichisof circular contournnd prelerzrbl y vmounted in rigid .connection with the machine supporting frame' neer V the peripheralportion ofthe drivergear.' The alljrace-l hasthe usual form'bf raceway for the anti-friction balls 46, Fig,2, and the driver y gear 2.5 .ha's'fit' lunder' surface Iier rested at 4:7, 'nearl the periphery :of .the driver rear to Vreceive theenti#fricti0 r` 11 v vb'a-llsf 46, Above the lower ball race '45 isthe upper ballrace-llS which is supported from the driver gear, and anti-friction' balls/19 are interposed between.' the upper` bull race 48 and the under recessed surface of the main rotary frame 26. In. the present instance,

the upper ball race 48, whichis constituted' as a' ring` of the same radius-as theil'ower 'ball rece, is supported bythe: riserssecured to sind extending -upwardlyffr'oni thev driver geur, so. that thelnpper ball'raceAS-rotetes with the 4driver gear'v` in v'fthe same .circular are esftherncewayl in the lower-.ball race.. It lhas been common.'v heretofore jto provide enti-.friction balls betweenffthe Aopposite .rei v'olving'l members Yin a 1l-)raiding or-.clrcular machine,ffbuti,in lthe present-:instance lthe npperand lower hall -racs'arefxnounted at points reinote'fro'm the axes of .rotationof the parts supported byth'e'mnnd Aare of novel "construction, the result 'being that all up :inddo'wnt or chatteringniovement Jof the 'main rotary frimeV and associatedE connections is avoided and the machine may be run smoothly at high speed.

The upwardly extending portion of they main rotary frame is provided with en annula;- trackway 51, as indicated in Figs. f3

andvl, in which run the elongated shoes 52 of the inner yarn carriers. The elongated shoes 52 of the inner yarn carriers forni' en iniportant feature of the construction, ,be-l cause under the centrifugal action et high speed the elongated shoe bearings 52 enable the carriers to move intheir annular path with a. smooth und uniform movement.

This feature of the construction, however,

is not claimed in this application, because constitutes the subject matter of the O. A. 1

Frederickson Patent No. 1,501,846, July 15, 1924. V

e inner yarn carriers, in accordance with the present invention, are novel in con" struction und are formed by the side frames 53, Fig. 6, which extend inwardly from thc shoes 52 and are connected at their inner ends by the cross-frame 54 carrying u roller 55 which rests upon a trnckwey 56 which may be conveniently supported in fixed position, as will later appear. Thus the' inner yarn carriers are supported at their outer portions in the annular trackwey of the main rotary frame by thc shoes 52, while the inner end portions of the carriers extend horizontally towards the braiding point and are supported by a roller and track. o Where the machine is run at high -s eed it is desirable that the yarn shall be de ivcred from the inner yarn carriers from a Apointiin longitudinal extension of `the yarn carrie-.1' and `towards the l'iraiding point, In accordance with the present invontionthev 'am granted curriers are adapted for the support o .fthe wound yarn on :1n-axis extending radially ot the circular path of movement ofthe carriers, and the yarn is unwound from the Ayarn mass in each carrier by thepu'llof lio the Vtension device 60 which may be conv'cnf;

iently-formed as two friction disks.- From the friction disks orvtension device 60 the yarn a passes inwardly of the carrier about an inner lguide 61, for the support of which each carrier has an inner gui extension 62 formed thereon, the construe` tiont being such that the inner ide Glidirectsthe yarn to the braiding `point'eu-beth.ri-

e support or"l 'Y and its driver. Y

'have`-roundedouter Vend portions 76 on i exten in?l preferab y `,"tiiilly in longitudinal extenebi; the'yarn mass within the carrier. 1- The bearings 63 for theiupport of the yarn mass within the .oarrejrsfin'ay be of usual construction, as indicated in Fi 6.

AEsch inner yarn carrier is provide vwith guides, 65, one of which extends v:tbove and the other below the Carrier for' guiding the outer yarn from contacting engagement t'vithtlie carrier as the two 'are moved in opposits directions.

-. .It Ahas been` the common prenne heretofore to traverse the inner yarn enrriers by means of drivers which have been frictionf ally driven in some cases, and in others have been positively driven. in all these cases, however, the outer yarn fromj the outer yarn supplies has been passed between the 7 'engnging surfaces ofl the driver and a' coacting-part 'on the carrier, with the result 'ft-hat the ysrnhas oftenY been broken.- In ecordance with the present invention, however, espeeisllywhere the machine isl driven at high speed, it is desirable that the .drivers bef driven positively at n. peripheral. speedl equal tothe 'movement yof translation liinpnrted to the outer yarn by the revolution of vthe lmein rotary freine, because v under .Such condition all liability ofii'njuring the yarn or breaking it es it passes between vthe driversnd 'the driver engagin element on urther .con-

the carrier is avoided. As

*tribu'ting to noninjurious influence .upon the out-er ysrn as it is shifted past the yarn carriers, the present invention provides n. novel" driver which is positively driven `sind ,cooperates with anovel `form of.l rotary mem.- ber on the carrier to be driven. l Secured to thesleeve 24, hereinbeforede- Vscribed as carrying the .driverl gear 25, is

the dri-ver' frame 66 which may be preferably formediby spider arms extending outwardly from the hub portion 67, VVas best 'shown in Fig. 2. Each of the radially eX- tendng-spider arms 67 is provided with 'a bearing 68 -at' its outer end in which is mounted the short shaft 69, the inner.- end portion of which carries` a beveledgenr 70 which'v engages n fixed or stationary toothed rack 71 carried by a frame 72', the hub portion 73.0f which is secured to the central stationary tube 6, 'as indicated in Fig. 2. Y

" Secured to each of the short shafts 69,

Fi 6, is the driver73 which, as illustrated in i 6, is formedwitheseries ofradiu'lly teeth 74 tapering outwardly and formed of some non abrasive material such as fibroid-or the like. lThe outwardly tapering teeth 74 provide' between thein'the spaces 75 in which 'the outer yarn b may rest as it passes between the cari-ier The teeth -74 of the driver which the outer yarn b will not hang but from lwhich it will slip and enter the yarn Wardl prtctnglleng 'I5 between ,the teeth/a9 the lum yam is Passed ben-veen the carrier;

and driven: 'The' toothed driver l contrived but it has been found in practice 73 may be variouslyw thats good form of such driver consists ini..l e toothed disk formed ofv .fibi'oid "or, .like 'Y material and s ered to the short shaft'69 by l, means of en overlying plate 77 A.which may be clam'ed n on the of the' disk by'nf sot nut 8, Fig. 6. The driversf73, it will be understood, occupy a osition slightlypV 'w one side of the rollers 9, so that when 2 l the drivers ere advanced .in u. circular pathl 4bythe driver frame 66 they push the inner carriers around, and at thesaine tiine the.

drivers are positively rotated by the'pinioiis Eechinner yarn carrieris vprovided with -a roll or roller for cooperation with tl'ie driver, as shown in Fig. 6, and the present invention contemplates that such roll for roller 7 9 shall be mounted for rotation inthe ol ning 80 formed in the shoe 52 and-tiraitv t e entpheral portion of the roller'79 'may p be, ute or provided with indentations and?.`V

vrising portions of less depth than the teethv 74 ofthe driver. vIn the present instance thea" roller 79 kis provided with the flutes 81 elternsting'with depressions 82 whichv are ene' gaged bythe end portions ofthe teeth 74 of the, drivers es the carrier is moved in itsafn# nular path.

Asfis usual in the type ofY braiding .ine-

chiioto which the present invention relates,"

ion?

the main rotary frame has mounted tlierf'a-v-V on s. series of yarninasseswhich are carried around the central axis of the machine in one direction while the inner yarn masses supf;v

ported by the Carriers are moved 'around th!" samepoint in .the opposite direction, sind means are'usually provided in such type off ius' machineforshifting the outer' yarn so that it Will passv over one carrier and under" proper tension p during thev l' lated from the main rotary freine bylins'ulated material 84,- iind this ring hasn down. extendingy annular flange which is space inwardly from the annular wall 27.v

Rising from the instal or brnssplate 83 are the supports 85 for the outer yarn supplies' 86, and the yarn from such outer yarn supplies is shifted relative to the inner carriers by ar shifting mechanism which, in the presneces-sii.l

' ent instance, is of novel character. Pivotally mounted at 87 on the main rotary frame is the shifter arm 88, one of said arms being supplied foreach outer yarn mass. The shifter erm 88 has a yarn guiding portion ,I or slot 89 -at one end, which directs the outer 1 yarn b through the wide slot 90 extending 'through the flan e portion 27 of the main rotary frame. Tie shiftcr'BS carries a pin 91 on which is mounted a shoe S which travels in the shifter cum 93 forme-d in the tired upwardly extending flange E et the table or lsupport 1, the construction losing such that as the main rotary frame is revolved about the machine center, the shoe 92 at one side of the pivotal mounting ofthe shifter will cause the shifter to move the arm upwardly or downwardly and deliver it in proper position for passing the louter yarn over or under the inner yarn carrier.

In a high speedhraider of the present type it isdesirable that proper tension be maintained upon the outer yarn as it is delivered to the braidino point an'd that it be shifted with n smeet i, uniform-motion as contradistinguishe'd to the quick snappy action usually found in practically all machines new in use. The present invention,

therefore, contemplates that the end portion of the shift/er arm which carries the yarn guide 89v be formed of spring? material so thatthe arm muy tiex inward y toward the center of the braiding machine as the thension of the yarn increases and will spring outwardly as' the tension ofthe yarn decreases. It is also desirable to make the part of the shifter erm on the opposite side of the pivotal support relatively heavy as at 94, Fig. ei., to balance the weight of theend portion-.havin'gtheyarn guide89.

To insure a smooth action and proper presentation of Athe* outer `yarn b by the Shifters', the upwardly extendingportion 27 ofthe-mein v'rotary frame'is provided with bearin s 95and 90, one at each sideof the pivote' support 87 of the shifter arms and against whichv the adjacent parts of the shifter 'arms Vmay bear as they :we moved to' shift the outer yarn. f'df'esired,l flic hearing 90 adjacent the end of thc shifter arm' carryinr the yarn guide may be curved tdeifectsliglt movement of the. yarn guide portion of the shifter arm to compensate for the diieren'ce'in distance between the braiding point and said yarn y guide when the .shifter takes its different Positions" The yarn from the'outer yarn masses or supplies asses about a rod or bail 97, Fig. 4, :ind-'t e pull of the 'yarn is at right angles to' the axis ot rotationof the outer yarn vmesses or.- supplies. From the rod vor bail 97 the yarn passes through the guide eye 98 and thenY through the yarn tension devicel 99 which may be constituted as disks .yieldingly held towards each other by a s ring 100, Fig. 4L. From the tension device 99 the outer yarn passes about a rollerV 101' mounted at the pivotal axis of the i t is usual in vide .some kind of .uitomatlc stop meehensm to stop the machine when one of the yarns breaks. The present machine is provided with such e mechanism in which there are novel features, und further, with Stop ping mechanism which may vbe actuated by the' attendant from different machine.

In the invention, as shown, the stopping mechanism is of the electro-magnetic type and comprises a source of electrical energy or battery 102, Fig. 2. one pole of which is connecte by a conductor 103 to a plate 104 mounted upon an insulated material, on the bearing 5 of the machine frame. The plate'104 has mounted in itsaJ-plunger 105 normally under the influence of a springl 106 which projects the plunger 105 upwardly against the under exposed surface of the contact plate 107 secured beneath the hub portion 108 of the driver gear. The plate 107 is insulated from the driver gear and is connected electrically to the plunger 109 normally pressed upwardly against the exposed under surface of a Contact plate 110 on the hub 25 of the mainrotary frame 26, by a springr 111.' The insulated contact plete 110 is connected by an 'insulated conductor 112, Fig. 2, with thev nietalor britse. plate 83.

The other pole of the battery or source of] braiding machines to pro Sel portions of the electrical energy in connected 'to the post 113, Figs. 2 and 3, where it is grounded.,

Each of the inner yarn carriers is provided withfa sliding contact 114 pivotally mounted on the carrier at 115, Fig. 6, a spring 116 Vnormally acting to hold the con tact ,114 in sliding engagement with the metallic or brass ringoY 83. The Contact 114;.

llO

is connected by an insulated conductor 117 to e post or contact. 118 mounted at the inn-er end portion of each carrier." Supportcd :for sliding' movement in a lug-"119, `mounted upon the inner end'of `each 'crri'er is a spring pressed plunger 120 having a hooked endv 121 to engage the yarn extending inwardly from the guide 61 towards thebraiding-point. The tensionv of the yarn which is Aengaged by the hook 121.is sufiicientto hold the vcontacts ll'and 120 out of engages ment against the tension lof the spring 122, Fig.- 6. Y When, however, 'the yarn on one of the carriers breaks orbecoines too 'slack for braiding purposes, the 'contslct 120 is'Ie leased, the circuit completedV 'and"thesrma-N ture 123, Fig. 5, is energized, therebyre.,y

vlso

(itl

leasing the trip el fromv engagement with the catch 41 and permitting the belt to be shifted .from the tast to 'the lloose pulleyr under the impulse of the spring 39 and the machine to stop.

In order tostop the machine in case of the breakage of one of the outer yarns, the outer yarn passes over the hooked end portion 126 of a. Contact member '127 mounted on the upwardly extending iange portion 27 of thermein rotary frame, erich contacts being normali impelled upwardly by the springs 128. ilhen one of the outer yarns breaks, the plunger or Contact 127 is released and engages the under surface ot the metallic or brass rino 83 and completes the circuit to efl'eot machine stoppage.

It is convenient to enable the machine attendant to stop the machine from different portions thereof, and to this end one or more push but-tons 12e may be located at different paris of the machine and connected to the electric circuit. Associated with each push button is a ground 125, whereby upon contact of the push-button and grou-nd Wire, the circuit is completed, the armature energized and the machine stopped.

In machines oi" the. general type described, the length and diameter of the yarn masses carried by the carriers are limited by the size of the machine, the throw ot' the "ams, and the size of the carriers then'iselves, a. coiidition which does not obtain with'respcct to the outer` vorn supplies. The yarns tor these machines are commonly Wound upon paper cores and are 'furnished in standard sizes, usually too large to place within the. inner-carriers of a braiding machine, thc resultv ot' which is that this yarn has to be reu'ound, at leastv before it is'placed `in the inner carriers. In the O. A. Frederielcson Patent No. 1,490,260, grantedv April 15, 1924, a method of obviating;` these difficulties, cheapening manufacture, and supplying yarn masses of the standard size to themachine is descriheil and claimed, and While the presentmachine which fornisrthe'subject of thisiuvention'v proposes to employv the nietliod hereinabove mentionedin facilitating1r economy of production, such method is not herein claimed as it forms the Subject of the said lprior a iplication.

What is c aimed is:

Claims.

1. In a high speed braiding machine, the. combination ot u main rotary frame supporting vouter yarn supplies find having slots through which the outer yarns pass inwardly towilll'tl fllit. liizliililig (iinlgnm'l im annular groove, horizontally c isposed. inner yarn carriers having shoes projecting 'from their .outei ends int-o said groove to form a sliding supportfor the outer ends of the carriers, a fixed annular Frame positioned below the .carriers to support their inner ends and provided with an annular rack, rollers at the inner ends of the. carriers that run upon said annularfi-amc, a serios of drivei'sfor traversing the inner carriers and having tapered notches thru which the yarn may i rack positively to rotate the drivers at a pcripheral speed equal to the movement .of

translation of the outer yarn supplies relative to the inner carriers, tatinr, said main trame.

2. in a high speed braiding machine, the combination ot a main rotary frame sup# porting outer yarn supplies and having slots thru which the outer yarns pass toward the braiding point and an annular groove, horizontally disposed inner yarn carriers having projections at their outer ends that extend into said groove to support the outer ends of the carriers, a fixed annular frame posi tioxied below the carriers to support, their inner ends and provided with en annular rack, a series of toothed drivers for, traversing the inner carriers and having deep yarn receiving notches between the teeth for the free passage of the yarn, a driver frame for advancing the drivers and provided with pinions connected to the drivers and meshint,r with said lack positively to rotate the4 drivers at a vripheral speed equalto the movement ot 'Translation ot' the outer yarn supplies relaivito the. inner carriers, and

means for rotating said main trame.

3. In a high speed braiding machine, the combination ot ii main rotary traine supporting outer yarn supplies and havimer an annular wall in which an annular groove is formed, horizontally disposed inner yarn carriers having: projections at their outer ends that extend into said groove to support the louter ends ot' the carriers, means for .supporting the inner ends oi the carriers, a series of toothed drivers for traversing the carriers supported independently of' the yarn carriers and having yarn receiving notches between the teeth tor the. free passage of the yarn, and a driver frame for advancing;r the drivers and provided with pinions for positively rotating the drivers at a peripheral speed equal to the movement of translation of the outer yarn supplies relativev 'to the inner carriers.`

4. In a .high speed braiding machine, the combination of a main rotary frame supporting outer vai-n sup Vlies and havingnn upstiindinp; wall in wine i au annular groove. is formed, a series of inner yarn carriers supported iii a horizontal plane for free movement about the axis oi the machine and" having projections at their outer ends that etxcnd into said groove to support the. outer end of the carriers, supporting rollers at the inner end of the carriers which rest upon a and means forro-` lil ` ends by each carrier and having a. toothed runway, means for revolving the main frame in one direction, a driver frame that is driven in the opposite direction, notched rolls at the outer end of the carriers toothed drivers mounted upon the driver trame in position to engage the notched rolls and push the carriers around their pathof travel and having deep notches between the teeth for the free passage of the yarn, and pinions secured to the drivers and operated positively to rotate the drivers at a peripheral speed equal to the movement ot translation of the outer yarn supplies relative to the inner carriers.

5. In a high speed braiding machine, the combination of a vmain rotary frame supporting outer yarn supplies and having un upstanding'wall in which an annular grooveY isformed, a series of radially extending innervyarn carriers supported at their outer )rejections extending into said groove an supported at their inner ends intepcndcnt of said main frame, rolls upon the yarn carriers, a series of drivers that en gage the rolls to traverse the yarn carriers over their path of travel and having out- Awardly `extending teeth, the ends of which abut against said rolls to push them forward and deep notches between the teeth for the free passage of the yarn, means for positively rotating the drivers, and means .for revolvin the main frame in one direction and the drivers in the opposite direction.

v '6. In a braiding machine, the combination of a main rotary frame supporting outer yarn supplies, a series of horizontal inner yarn carriers supported at their opposite ends and constructed to support yarn supplies with their axes extending toward the braiding point, a driver engaging roll u pon eriphery, a series of traveling drivers fort ie carriers that move about the axis of the braiding machine .relative to the support for the carriers and each having aseries of teeth ot greater depth than the teeth of said rolls and forming spaces for the unobstructed passage of yarn, and means for revolving ythe main frame in one direction and the drivers in the opposite direction. v

7. In a high speed braiding machine, the combination of a fixed supporting frame having an annular ball raicevvayy of large diameter for supporting a large driver gear 'f at'l-a'substantial distance from its axis of rotation, a main rotary frame that supports thel Outer yarn carriers and having an annular ball raceway spaced above and of approximately the same diameter as the race- Way ,of the ixed Aframe, a'driver gear of lar e diameter rotatably mounted between sait race ways to support the main rotary fraine'aod having a raccway formed at its lower face to cooperate with the raceway 'of the {ixed base and a raceway at its upper face to cooperate with the raceway of the main rotary frame, anti-friction balls in said racewa s to support the driver gear and main rame at substantial distances from their axis of rotation, a lower annular toothed rack secured to the driver gearfin close proximity to the lower raceway, an upper annular toothed rack secured to said Vmain frame in close proximity to the upper raceway, and a gear meshing with said racks to rotate the driver gear and main frame in opposite directions.

8. In a braiding machine, the combination of a fixed supportin frame having an annular ball raceway o large circuniference for su )porting a large river gear at a substantie distance from its axis of rota` tion, a main rotary frame that supports the outer yarn carriers and havinnr an annular ball raceway spaced above and of approximately the same circumference as the raceway of the4 fixed frame, a driver gear of lar e diameter rotatably mounted between y sai raceways to support the main rotary frame and having a raceway formed at its lower face to cooperate with the raceway of the fixed base and a raceway at its upper face to cooperate with the raceway of the main frame, a driver frame for the inner yarn carriers that is rotated by said driver gear, anti-friction balls in said raceivays to su port the driver gear and main farme at su stantial distances from their axis of rotation, a lower annular toothed rack secured to the driver gear in close proximity to the lower raoeway, an upper annular toothed rack secured to said mainA frame. in close proximity to the upper raceway, and a.

gear meshing with the racks tol rotate the inctions.

- 9. In a braiding machine of the class dcscribed, the combinationoi' the main rotary frame carrying outer yarn supplies und having an annular 'track\vay, u. series of yarn carriers traveling in the annular traclrway, positively. driven rotating driveis for the carriers, outer yarn Shifters pivoinlly mount Aed on the main rotary frame with a yarn guide at one side of the pivotal mounting and a shifter shoe at the opposite side there of,lbearing blocks mounted on the main rotary frame at each side of the pivot of the yarn Shifters, and a cam engaged by the shoes for rocking the Shifters during the revolution of the main rotary frame. 10; In a braiding machine, the combination of a main rotary lframe having an annular trackway and carrying outeryarn sup* lies, a series of inner yarn carriers, drivers or traversing the carriers in the traekway,

'shifter at' Athe opposlte side of a cam fonosoillating the shifter,

opposite side thereof, anlonter yarn tension device -r'nounted lon the mein rotary frame betweenthe. yarn sup lies'nnd shifte'r,' and e com for operating t e shifterstl l' e 11'. Inno; braiding machine-.of the `class described, the combination of a main rotary r'amejhaving en' nnmilarrackw--y, Series of inner yarn corrieri? traveling in lSaid trackwny, outer arn sup lies mounted-on the inem rote-ry rame wit 1' their axes disposed in th-:direction of `moven'xentof the mein rot'ery frame, an outer yarn guide for each 'of the outer yarn supplies arranged to cause the p-ull'ofv the yarn to rotete the outer yarn supplies, e tension device associated with each outer yarn sfly, outer yarn Shifters pivotally moun v on the mein revol'uble frame, boerin at opposite sides of the pivot o the Shifters for maintaining the yarn tension A:1n/the shiftereare moved,-and means for oscillating theshifters during revolution of the maincrota frame.

l2. In a'brniding 4machine of y eclass described, the combination of e imam rota v. frame having wide open Slots for the delivery of the outeryarn, a balanced outer yarn shifter pivoted between its ends on e main rotary frame, bearing'. blocks on the moin rotary frame at opposite sides of the pivot; 'of vthe shifter a. einst which the lslliiiter beers', n yarn guife on thejshifter et one Side ofrits ivot, e shoev on the the pivot,

and a yarn guide on the shifter atits pivotal axis. Y '13. In` e .braiding machine of tlie'eless described, the combination of a, main roterV frame carrying outer yarn'supplies and hevingerido open Aslots for the passage zof the eute'rfarnto the braiding point, am outer ynrri ifter pvoted'betweenitspends to the mein rotery frame und counter-balanced to avoid anysnappy action on-the: yarn, e. yarn guide-et the -end of Ithe shifter, a shoe` on the shifter atthe'vpposite' side of its pivot, e, Stationen' comfor oscillating the counterbalanced s ifter,`and bearing' blockson the the combination of e main rotary frame, le

driver frame, ,e stationary central support about which said fra-mesure re volve'd in opposite directions, a toothed rack connected to .the main rotaryframe, a driver gea'rjconnected to the driver frame, o lower entiffrictien bell race supported f from" the main machine frame remote from the axis of' rotation, a ball lower face of the driver balls between the race. an v upper ball race supported by and rotatable with the `driver 'gear in a. the same radius risers. extending h b u ar and su ort-in t vre u r a roce, iieball groovept the gunder-siiieof the moin rotary freine, balls interposed between'the groove formed in the ar, antbfrictlonf driver gear, en' v vcircular are ofas the lower ball rece,g` upward from the driver upper bellV rece and gmove of the main rotary frame, and means for rotating the mainA rotary ratnennd driver frame in opposite directions.;

15. In a braiding' machine, the combine:-V tion of a. main rotary frame having an npstanding wall, ai ring mounted upon vand. electrically .insulated from said 'wall and having -a downwardly extending mnulrl flange spaced from seid wall to provide foy protected space between itand said `Weill which is covered by 'said ring, e series of yarn carriers supported within the main frame to travel about-anannulnr racewey, means for driving the carriers, electrical stop vmechanism .including electrical 'contactsYY uson the carriers ond controlled by the ynrn o the mner carriers, and sliding contacte upon the{ inn er carriers positioned to travel in Said protected space formed underthej with' on .inner rina'nd tof-'contact w'a "of the ring.

lIn testimony whereof,v I name' to this' specification.

OTTO A. FREDERICKSON.

have 'teigned 

